Water-heater.



'A. B. Du PONT.

WATER HEATER. APPLICAloN FILED AUG.20. 19111.

Patented Apr. 8,1919.

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ANTOINE BEDERMANN DU Poner,l OFOLEVELAND, OHIO.

WATER-HEATER.

igeaasaf n '.To all co'lwmiz't may concern." o Y 1 .a Be it knownthatnLANToiNE BEDERMANN Y -Dir` PONT, citizen .of the United States, residing at Cleveland, in the county of Cuyahoga -and State of Ohio, have invented certain new fio uctsY of combustion which move upwardly and useful Improvements in Water-Heaters, of which the following is a specification. v'

My vinvention relates to an improvement in water heaters, in` which a plurality of.'V

water circulating elements are connected in a particular way to utilize the outgoing heat productsV of the heater in pre-heating the cold-V -water coming into the circulating elements and inincreasin the temperature 'of the preheated water be ore delivering thesame intoVA a common discharge pipe, and in which eachl water-circulating element communicates directly with the said mainy discharge pipe to assure an unrestricted circulation and effect the highest degree of heating results -with ab-k solute safety and great economy. y

In the accompanying drawing, Figure 1 is a sectional view of a heater containing a pair of Water-circulating coilsarranged and connected according to my invention, and lFigs. 1

2 and 3 are sectional and side views, respectively, of modified forms of the apparatus, allV as hereinafter more particularly described.

Thus, in Fig. 1 I show a cylindrical heater casing 2 having a gas burner k3 beneath its open bottom and equipped with an exhaust pipe 4 at its top. VTwo separate coils of pipe 5 and 6, respectively, are supported in rany suitable way, one above the other centrally with the combustion chamber17,fand ther- 1 Supper coil 5 has a'cold water supply pipe 8 connected with its bottomeintake end. `The flow of water is upwardly through the pipe and in the same generaldirection as the prodthrough Vcombustion chamber 7, and the hot water from coil 5 is directly downwardly from its upperv end into the `bottom of ythe lower 'coil 6Vby vertical pipe 9.; Coil 6v is placed-immediately above and'inclose proximity to burner 3 and'is exposed-to the great- 'Y est kheat derived therefrom, Ywhile upper burner 5 is mounted in a zoneof lower temperature, that is, it is more remote and heatedV by the out-going products ofcombustion. Thus, the cold water isV first Vheated by the exhaust heat-products and then subjected to Y a more intense heat upon displacing the more' highly heated water in lower coil 6 which occupies the zone of highest temperature in Application med Augist 20,1917.' seria; No. 187,057..

`j `Specication of llettersPatent. i fPatented Apr, 8, 1,919.

circulatin'gsystem the water lis in a highlyycombustion chamber 7. Consequently, when the-water is discharged from the upper'end Y of lower lcoil 6 intofthestand-pipev 10 of the heated state, and obviously any vaporlon steam produced during such heating :in-lower coil 6 is free to escape through stand-pipe 10. A

Similar relief is obtained'forupper coil'5 by a short pipe connection 12 extending from the .upper end of said coil 5 to stand-pipe 10, and this communicating 'pipe'v or passage is F also of utility in effecting constant circula- *n ltion of the water through thel coils underall working conditions. In fact, the vapparatus would be unsafe and unreliable',withoutfthe connecting pipe 12-as this pipe affords relief of vapors .and overiow of hot water under high-heating conditions and permits a return flow to coil 5 from stand-pipe 10 whenever a condition arises to cause such return flow. Furthermore, the apparatus may be operated very effectively sumption of fuel.

In Fig. 2, I show three chambered sections:

with a relatively low conf 14, 15 Vand 16 superposed and havin vertical Y' tubes 17 in open communication at t eir ends for the passage of the heat productsfrom a burner 18 located beneath the bottom section,

, and the upperY section has a cover 19` with a central exhaust pipe 20. The cold water is supplied to the bottom end of the uppermost sectionV 14 by way of intake 21 and is discharged from the upper endjofsaid section` Y` .Y 14 by a pipe 22 which connects with the mid.V

dle sectionl l5 near itsbottom. This middle section has a discharge pipel 23V at its upper" end which extends downward andrconnects with the lower endof the bottom section 17, and adischarge pipe 24 from the upper end of section 17 connects'with a stand-pipe 25.'

The upper ends of both circulating pipes 22 and' 23 Vhave open communication rwith the Y.

stand-pipe by separatel connecting pipes 26 land 27, respectively,thereby affording sep- Y arate relief and circulating passages Vbetween the upper end of each sectionand the standpipe. Y

In Fig. 3 I show' a single unit 28 for a hotwa'ter heating furnace having hollow walls divided into two separate chambers 29 and 30 through which the water is caused to cirtake pipe 31 at one side and lower end theref Y culatey as lin the other apparatus described.

Thus, the upper halfof the unit hasan ingf of,yand-a discharge'pipe 32 centrally at its g top which connects with a vertical pipe 33k .ber BO'and tothe stand-pipe onY account of the higher temperatures produced in the lower half of the unit at the main seat ofV combustion` above the grate bars 36. A short pipe 37V connects pipe 32 with the stand-pipe 35 for relief of' vapors and complete and constant circulation of water under all conditions arising in operations, and'to afford ab- `solute safety and the maximum effectiveness and economy in operations.

What claim is: v A water heater comprising a plurality of Copies 'of this patentmay" Yne obtained for water-circulating units arranged one above the other and a fuel burner at the bottom of said unitsinheating relations therewith, the said units having open pipe connection running from the top of one unit to the one neXt beneath for the downward flow of the gradually heated water, a hot water dischargepipe for all said units connected at its lower end with the upper portion of they bottom unit and by branch pipes with the upper'porti'ons of the superposed units.;v andl a safety pipe from the top of eaclrofV said :branch pipes having pipe connection with the saiddischarge pipe.

Signed at Cleveland, in the county of Cuyahoga, and Statefo-frhio, this ith day of May, '1917. Y

' ANTOINE 'BEDERM'AN N' DUl PONT.

fiveA cents each, bygad'd-ressng `the YCommissionerof Patents,

WashingtonfD. G. 

